Unexpected error while trying to join a minecraft server with forge

[FighterJet16]

---- Minecraft Crash Report ----

WARNING: coremods are present:
  GameSense (GameSense.v2.3.0.jar)
  MixinLoaderForge (creepy-salhack-2.08.1.jar)
  KDgB (Inertia Client 3.1.3 - 1.12.2.jar)
  LambdaMixinLoader (lambda-2.07.01.jar)
Contact their authors BEFORE contacting forge

// Uh... Did I do that?

Time: 10/11/21 6:37 PM
Description: Unexpected error

java.lang.NullPointerException: Unexpected error
    at net.minecraft.entity.Entity.func_70068_e(Entity.java:1462)
    at net.minecraft.client.renderer.entity.RenderLivingBase.func_177067_a(RenderLivingBase.java:622)
    at net.minecraft.client.renderer.entity.RenderLivingBase.func_177067_a(RenderLivingBase.java:31)
    at net.minecraft.client.renderer.entity.Render.func_76986_a(Render.java:78)
    at net.minecraft.client.renderer.entity.RenderLivingBase.func_76986_a(RenderLivingBase.java:290)
    at net.minecraft.client.renderer.entity.RenderLiving.func_76986_a(RenderLiving.java:50)
    at net.minecraft.client.renderer.entity.RenderLiving.func_76986_a(RenderLiving.java:16)
    at com.lambda.client.module.modules.render.ESP.drawEntities(ESP.kt:143)
    at com.lambda.client.module.modules.render.ESP._init_$lambda-28(ESP.kt:113)
    at com.lambda.client.module.modules.render.ESP$$Lambda$1347/1230833975.invoke(Unknown Source)
    at com.lambda.client.util.threads.ThreadSafetyKt.safeListener$lambda-1(ThreadSafety.kt:26)
    at com.lambda.client.util.threads.ThreadSafetyKt$$Lambda$971/888922275.invoke(Unknown Source)
    at com.lambda.client.event.LambdaEventBus.invokeSerial(LambdaEventBus.kt:49)
    at com.lambda.client.event.LambdaEventBus.postProfiler(LambdaEventBus.kt:37)
    at com.lambda.client.event.LambdaEventBus.post(LambdaEventBus.kt:30)
    at com.lambda.client.event.ForgeEventProcessor.onWorldRender(ForgeEventProcessor.kt:54)
    at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_84_ForgeEventProcessor_onWorldRender_RenderWorldLastEvent.invoke(.dynamic)
    at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
    at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182)
    at net.minecraftforge.client.ForgeHooksClient.dispatchRenderLast(ForgeHooksClient.java:196)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at net.optifine.reflect.Reflector.callVoid(Reflector.java:669)
    at net.minecraft.client.renderer.EntityRenderer.func_175068_a(EntityRenderer.java:1959)
    at net.minecraft.client.renderer.EntityRenderer.func_78471_a(EntityRenderer.java:1621)
    at net.minecraft.client.renderer.EntityRenderer.func_181560_a(EntityRenderer.java:1390)
    at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1119)
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:398)
    at net.minecraft.client.main.Main.main(SourceFile:123)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Thread: Client thread
Stacktrace:
    at net.minecraft.entity.Entity.func_70068_e(Entity.java:1462)
    at net.minecraft.client.renderer.entity.RenderLivingBase.func_177067_a(RenderLivingBase.java:622)
    at net.minecraft.client.renderer.entity.RenderLivingBase.func_177067_a(RenderLivingBase.java:31)
    at net.minecraft.client.renderer.entity.Render.func_76986_a(Render.java:78)
    at net.minecraft.client.renderer.entity.RenderLivingBase.func_76986_a(RenderLivingBase.java:290)
    at net.minecraft.client.renderer.entity.RenderLiving.func_76986_a(RenderLiving.java:50)
    at net.minecraft.client.renderer.entity.RenderLiving.func_76986_a(RenderLiving.java:16)
    at com.lambda.client.module.modules.render.ESP.drawEntities(ESP.kt:143)
    at com.lambda.client.module.modules.render.ESP._init_$lambda-28(ESP.kt:113)
    at com.lambda.client.module.modules.render.ESP$$Lambda$1347/1230833975.invoke(Unknown Source)
    at com.lambda.client.util.threads.ThreadSafetyKt.safeListener$lambda-1(ThreadSafety.kt:26)
    at com.lambda.client.util.threads.ThreadSafetyKt$$Lambda$971/888922275.invoke(Unknown Source)
    at com.lambda.client.event.LambdaEventBus.invokeSerial(LambdaEventBus.kt:49)
    at com.lambda.client.event.LambdaEventBus.postProfiler(LambdaEventBus.kt:37)
    at com.lambda.client.event.LambdaEventBus.post(LambdaEventBus.kt:30)
    at com.lambda.client.event.ForgeEventProcessor.onWorldRender(ForgeEventProcessor.kt:54)
    at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_84_ForgeEventProcessor_onWorldRender_RenderWorldLastEvent.invoke(.dynamic)
    at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
    at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182)
    at net.minecraftforge.client.ForgeHooksClient.dispatchRenderLast(ForgeHooksClient.java:196)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at net.optifine.reflect.Reflector.callVoid(Reflector.java:669)
    at net.minecraft.client.renderer.EntityRenderer.func_175068_a(EntityRenderer.java:1959)
    at net.minecraft.client.renderer.EntityRenderer.func_78471_a(EntityRenderer.java:1621)

-- Affected level --
Details:
    Level name: MpServer
    All players: 1 total; [EntityPlayerSP['503_errornull'/1274931, l='MpServer', x=0.45, y=119.00, z=-625010.60]]
    Chunk stats: MultiplayerChunkCache: 49, 49
    Level seed: 0
    Level generator: ID 00 - default, ver 1. Features enabled: false
    Level generator options: 
    Level spawn location: World: (0,0,0), Chunk: (at 0,0,0 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
    Level time: 168104 game time, 750504104 day time
    Level dimension: 0
    Level storage version: 0x00000 - Unknown?
    Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
    Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
    Forced entities: 2 total; [EntityPlayerSP['503_errornull'/1274931, l='MpServer', x=0.45, y=119.00, z=-625010.60], EntityHorse['Owner: 503_errornull S: 0.0 J: 4.08 HP: 19.0'/1274934, l='MpServer', x=-2.24, y=120.00, z=-625003.30]]
    Retry entities: 0 total; []
    Server brand: Waterfall <- Papaya
    Server type: Non-integrated multiplayer server
Stacktrace:
    at net.minecraft.client.multiplayer.WorldClient.func_72914_a(WorldClient.java:532)
    at net.minecraft.client.Minecraft.func_71396_d(Minecraft.java:2741)
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:427)
    at net.minecraft.client.main.Main.main(SourceFile:123)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details --
Details:
    Minecraft Version: 1.12.2
    Operating System: Windows 10 (amd64) version 10.0
    Java Version: 1.8.0_51, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 484117784 bytes (461 MB) / 1442840576 bytes (1376 MB) up to 2147483648 bytes (2048 MB)
    JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    FML: MCP 9.42 Powered by Forge 14.23.5.2847 Optifine OptiFine_1.12.2_HD_U_G5 11 mods loaded, 11 mods active
    States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored

    | State  | ID             | Version      | Source                                | Signature |
    |:------ |:-------------- |:------------ |:------------------------------------- |:--------- |
    | LCHIJA | minecraft      | 1.12.2       | minecraft.jar                         | None      |
    | LCHIJA | mcp            | 9.42         | minecraft.jar                         | None      |
    | LCHIJA | FML            | 8.0.99.99    | forge-1.12.2-14.23.5.2847.jar         | None      |
    | LCHIJA | forge          | 14.23.5.2847 | forge-1.12.2-14.23.5.2847.jar         | None      |
    | LCHIJA | craftstudioapi | 1.0.0        | CraftStudio-1.0.0.93-mc1.12-alpha.jar | None      |
    | LCHIJA | lunatriuscore  | 1.2.0.42     | creepy-salclient-2.08.1.jar             | None      |
    | LCHIJA | schematica     | 1.8.0.169    | creepy-salclient-2.08.1.jar             | None      |
    | LCHIJA | creepy-salhack | 2.8.1        | creepy-salclient-2.08.1.jar             | None      |
    | LCHIJA | gamesense      | v2.3.0       | GameSense.v2.3.0.jar                  | None      |
    | LCHIJA | inertia        | 3.1.3        | Inertia Client 3.1.3 - 1.12.2.jar     | None      |
    | LCHIJA | lambda         | 2.07.01      | lambda-2.07.01.jar                    | None      |

    Loaded coremods (and transformers): 
GameSense (GameSense.v2.3.0.jar)
  
MixinLoaderForge (creepy-salhack-2.08.1.jar)
  
KDgB (Inertia Client 3.1.3 - 1.12.2.jar)
  
LambdaMixinLoader (lambda-2.07.01.jar)
  
    GL info: ' Vendor: 'NVIDIA Corporation' Version: '4.6.0 NVIDIA 457.51' Renderer: 'GeForce GTX 1060 3GB/PCIe/SSE2'
    Launched Version: 1.12.2-forge1.12.2-14.23.5.2847
    LWJGL: 2.9.4
    OpenGL: GeForce GTX 1060 3GB/PCIe/SSE2 GL version 4.6.0 NVIDIA 457.51, NVIDIA Corporation
    GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

    Using VBOs: Yes
    Is Modded: Definitely; Client brand changed to 'fml,forge'
    Type: Client (map_client.txt)
    Resource Packs: enchantmentglint.zip, Faihtful128x128 1.12.2
    Current Language: English (US)
    Profiler Position: N/A (disabled)
    CPU: 8x AMD Ryzen 5 1400 Quad-Core Processor 
    OptiFine Version: OptiFine_1.12.2_HD_U_G5
    OptiFine Build: 20210124-142939
    Render Distance Chunks: 17
    Mipmaps: 4
    Anisotropic Filtering: 1
    Antialiasing: 0
    Multitexture: false
    Shaders: null
    OpenGlVersion: 4.6.0 NVIDIA 457.51
    OpenGlRenderer: GeForce GTX 1060 3GB/PCIe/SSE2
    OpenGlVendor: NVIDIA Corporation
    CpuCount: 8 

I always get this error when i try to join the server

Edited October 11, 2021 by FighterJet16

[FighterJet16]

Oh btw i am using optifine to forgot to note AND the error only started happening today FYI

[Luis_ST]

1.12 is no longer supported on this forum.

Please update to a modern version of Minecraft to receive support.